Osc udp receiving on another computer problem

It just started happening on my computer: the symptoms are exactly like here, the only difference that in my case I am using UDP, not TCP, so the proposed solution is not going to work in my case. The whold setup used to work couple of months ago on this computer, The only thing I could think of is upgrading to highSierra.

I also ran tcpdump like this:

sudo tcpdump -A ‘udp and port 3001’

and I see the OSC UDP packets arriving from my sender on another computer.

eight_io-MacBook-Pro:~ eight_io$ sudo tcpdump -A ‘udp and port 3001’
Password:
tcpdump: data link type PKTAP
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on pktap, link-type PKTAP (Apple DLT_PKTAP), capture size 262144 bytes
00:26:20.000342 IP 192.168.1.34.ndmp > broadcasthost.redwood-broker: UDP, length 84
…E…p…@…"…’…/location/1.,sss…NONE…8508E811-8FC5-4D73-9B73-994EBB74B865…192.168.1.34…
00:26:20.924058 IP 192.168.1.34.ndmp > broadcasthost.redwood-broker: UDP, length 84
…E…pH…@.o…"…’…/location/1.,sss…NONE…8508E811-8FC5-4D73-9B73-994EBB74B865…192.168.1.34…
00:26:21.946163 IP 192.168.1.34.ndmp > broadcasthost.redwood-broker: UDP, length 84
…E…p.)…@…"…’…/location/1.,sss…NONE…8508E811-8FC5-4D73-9B73-994EBB74B865…192.168.1.34…
00:26:22.972201 IP 192.168.1.34.ndmp > broadcasthost.redwood-broker: UDP, length 84
…E…p.6…@.&}…"…’…/location/1.,sss…NONE…8508E811-8FC5-4D73-9B73-994EBB74B865…192.168.1.34…
^C
4 packets captured
35 packets received by filter
0 packets dropped by kernel

The OSC listener still does not see them.

Any tips on how to fix this?